Ankerite
C 2%, Ca 1%, Fe 1%, Mg 1%, O 6%,

estimated elemental composition and molecular weight 
Minerals with the same name may vary widely in appearance and composition, and very few are >99% (reagent grade) pure.

Gram formula weight (molecular mass) = 240.24


Minerals may vary in elemental composition and impurity levels. The formula given is an approximation.
Wikipedia Page:

Ankerite
is defined with respect to the entities below:
The entities below are defined with respect to:
Ankerite
Mineral (generic)


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